Postage within Australia = Free
Installation is extremely straight forward, everything fits straight into your stock harness, no wiring is required, plug and play.
Yes it does come with instructions but I doubt you will need it, its that easy.
The only thing you have to be careful of is not touching the globe with your bare hands as grease/oil off your hands will cause the bulb to blow when it heats up, so use a rag/cloth when handling the globe.
If you are unsure of what bulb type you need, PM me the Year and model of your car and I'll let you know. (R32-R33-R34 are all H1 Globes).